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Low-Cost CVCC Flyback controller With primary-side regulation for bipolar Power Device

US ECCN: EAR99 US/Local Export Classification Number

Inventory: 29,857  

Quality information

RoHS Yes
Lead finish / Ball material NIPDAU
MSL rating / Peak reflow Level-1-260C-UNLIM
Quality, reliability
& packaging information

Information included:

  • RoHS
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
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Packaging information

Package | Pins Package qty | Carrier: Operating temperature range (°C)
SOT-23 (DBV) | 6 250 | SMALL T&R
-40 to 125
Package | Pins SOT-23 (DBV) | 6
Package qty | Carrier: 250 | SMALL T&R
Operating temperature range (°C) -40 to 125
View TI packaging information

Features for the UCC28722

  • < 50-mW No-Load Power
  • Primary-Side Regulation (PSR) Eliminates Opto-
  • Dynamic BJT Drive
  • ± 5% Voltage and Current Regulation Across Line
    and Load
  • 80-kHz Maximum Switching Frequency Enables
    High-Power Density Charger Designs
  • Quasi-Resonant Valley-Switching Operation for
    Highest Overall Efficiency
  • Wide VDD Range Allows Small Bias Capacitor
  • Output Overvoltage, Low-Line, and Overcurrent
    Protection Functions
  • Programmable Cable Compensation
  • SOT23-6 Package

Description for the UCC28722

The UCC28722 flyback power supply controller provides isolated-output constant-voltage (CV) and constant-current (CC) output regulation without the use of an optical coupler. The device processes information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current.

Dynamically-controlled operating states and a tailored modulation profile support high-efficiency operation at all load levels without sacrificing output transient response.

Control algorithms in the UCC28722 device allow operating efficiencies to meet or exceed applicable standards. The output drive interfaces to a bipolar transistor power switch, enabling lower-cost converter design. Discontinuous conduction mode (DCM) with valley switching reduces switching losses, while modulation of switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.

The controller has a maximum switching frequency of 80 kHz and always maintains control of the peak-primary current in the transformer. Output overvoltage and overcurrent as well as input undervoltage protection features help keep primary and secondary component stresses in check. The UCC28722 also allows compensation for voltage drop in the cable to be programmed with an external resistor.


Qty Price (USD)
1-99 0.711
100-249 0.547
250-999 0.403
1,000+ 0.288

Additional package qty | carrier options

Package qty | Carrier 3,000 | LARGE T&R
Inventory 1,007
Qty | Price (USD) 1ku | 0.15 1-99 0.371 100-249 0.285 250-999 0.21 1,000+ 0.15
Custom reel may be available